<b>Influence of medium composition in the production of ethanol by <em>Zymomonas mobilis</em></b> - DOI: 10.4025/actascitechnol.v32i1.7454

Authors

  • Fernanda Maria Pagane Guereschi Ernandes UNESP
  • Maurí­cio Boscolo UNESP
  • Crispin Humberto Garcia Cruz UNESP

DOI:

https://doi.org/10.4025/actascitechnol.v32i1.7454

Keywords:

Zymomonas mobilis, ethanol, ethanol fermentation, factorial design

Abstract

The production of ethanol using Zymomonas mobilis had been reported to be three to four times larger than with Saccharomyces cereviseae. The influence of pH, temperature and composition of the means of fermentation are parameters that can direct the metabolism for the production of ethanol. The objective of this study was to evaluate the production of ethanol by Zymomonas mobilis CCT 4494, by variations of the initial pH, temperature and concentrations KCl, K2SO4, MgSO4, CaCl2 and sucrose, by a factorial experimental design of type 27-2, according to the model proposed by Box et al. (1978). For this, the broth of sugar cane was used as sole carbon source, because it is cheap and easily accessible in the region of São José do Rio Preto, São Paulo State. According to the experimental design, the bacteria Zymomonas mobilis CCT 4494 has adapted in the fermentation mean containing high concentrations of sucrose, and supported the change of pH and temperature of fermentation. The highest amount of ethanol produced was 8.89 mg mL-1. This is not similar to the levels of secondary metabolites produced by Zymomonas mobilis CCT 4494.

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Author Biography

Fernanda Maria Pagane Guereschi Ernandes, UNESP

Tem experiência na área de Educação (Ensino Técnico ao Superior) e de pesquisa em Microbiologia e Bioquí­mica dos Microrganismos, com ênfase principalmente em Microbiologia Industrial e em Fermentação. Faz parte de um Grupo de Pesquisa em Biopolí­meros e subprodutos bacterianos, tendo como linha de pesquisa Bioprocessos e Microbiologia, pela Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) - São José do Rio Preto. Atua como docente na Faculdade de Tecnologia em Processos Quí­micos (FARTEC) e na Universidade Paulista (UNIP) de São José do Rio Preto. Currí­culo Lattes

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Published

2009-11-13

How to Cite

Ernandes, F. M. P. G., Boscolo, M., & Cruz, C. H. G. (2009). <b>Influence of medium composition in the production of ethanol by <em>Zymomonas mobilis</em></b> - DOI: 10.4025/actascitechnol.v32i1.7454. Acta Scientiarum. Technology, 32(1), 21–26. https://doi.org/10.4025/actascitechnol.v32i1.7454

Issue

Vol. 32 No. 1 (2010)

Section

Biotechnology

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